linux-kernel - [PATCH] ASoC: dmaengine_pcm: add peripheral configuration

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Message-Id: <1611639496-4616-1-git-send-email-shengjiu.wang@nxp.com>
Date:   Tue, 26 Jan 2021 13:38:16 +0800
From:   Shengjiu Wang <shengjiu.wang@....com>
To:     lars@...afoo.de, perex@...ex.cz, tiwai@...e.com,
        alsa-devel@...a-project.org, linux-kernel@...r.kernel.org
Subject: [PATCH] ASoC: dmaengine_pcm: add peripheral configuration

The commit e7bbb7acabf4 ("dmaengine: add peripheral configuration")
adds peripheral configuration for dma_slave_config.

This configuration is useful for some audio peripherals, for
example, the peripheral supports multi fifos, we can
let the DMA know which fifos are selected. So also add
this configuration for snd_dmaengine_dai_dma_data.

Signed-off-by: Shengjiu Wang <shengjiu.wang@....com>
---
 include/sound/dmaengine_pcm.h | 5 +++++
 sound/core/pcm_dmaengine.c    | 2 ++
 2 files changed, 7 insertions(+)

diff --git a/include/sound/dmaengine_pcm.h b/include/sound/dmaengine_pcm.h
index 8c5e38180fb0..96666efddb39 100644
--- a/include/sound/dmaengine_pcm.h
+++ b/include/sound/dmaengine_pcm.h
@@ -66,6 +66,9 @@ struct dma_chan *snd_dmaengine_pcm_get_chan(struct snd_pcm_substream *substream)
  * @chan_name: Custom channel name to use when requesting DMA channel.
  * @fifo_size: FIFO size of the DAI controller in bytes
  * @flags: PCM_DAI flags, only SND_DMAENGINE_PCM_DAI_FLAG_PACK for now
+ * @peripheral_config: peripheral configuration for programming peripheral
+ * for dmaengine transfer
+ * @peripheral_size: peripheral configuration buffer size
  */
 struct snd_dmaengine_dai_dma_data {
 	dma_addr_t addr;
@@ -76,6 +79,8 @@ struct snd_dmaengine_dai_dma_data {
 	const char *chan_name;
 	unsigned int fifo_size;
 	unsigned int flags;
+	void *peripheral_config;
+	size_t peripheral_size;
 };
 
 void snd_dmaengine_pcm_set_config_from_dai_data(
diff --git a/sound/core/pcm_dmaengine.c b/sound/core/pcm_dmaengine.c
index 4d0e8fe535a1..1fc2fa077574 100644
--- a/sound/core/pcm_dmaengine.c
+++ b/sound/core/pcm_dmaengine.c
@@ -125,6 +125,8 @@ void snd_dmaengine_pcm_set_config_from_dai_data(
 	}
 
 	slave_config->slave_id = dma_data->slave_id;
+	slave_config->peripheral_config = dma_data->peripheral_config;
+	slave_config->peripheral_size = dma_data->peripheral_size;
 }
 EXPORT_SYMBOL_GPL(snd_dmaengine_pcm_set_config_from_dai_data);
 
-- 
2.27.0